"Digital age", "digital society", "digital civilization": many expressions are used to describe the major cultural transformation of our contemporary societies. Digital Dictionary presents the multiple facets of this phenomenon, which was born of computers and continues to permeate all human activity as it progresses at a rapid pace. In this multidisciplinary work, experts, academics and practitioners invite us to discover the digital world from various technological and societal perspectives. In this book, citizens, trainers, political leaders or association members, students and users will find a base of knowledge that will allow them to update their understanding and become stakeholders in current societal changes.